Q:
I have placed my horizontal menu in javascript (1003 px width) in a table whose width is 1003px
my dropdowns span from extreme left to extreme right (screen shots attached)
by default the dropdown is leaving 20 pixels margins on both the ends which disturbs my layout.
This happens when my screen resolution is 1024 x 768,
when viewed in higher or wide screen monitors this problem does not arise.
Please suggest a solution.

Appreciate your response.

A:
This is space to document borders. We've set this space, so that your
submenus will not look like the part of browser window. If you want
you can delete that space.

Open engine file for horizontal menu in javascript - dmenu.js - file in any text editor and find the following code: